Related InterviewSolutions

• A, B, C and D summarize the properties of Sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (iii): A. Dilute acid (typical acid properties) B. Non-volatile acid. C. Oxidizing agent. D. Dehydrating agent (i) Preparation of Hydrogen Chloride. (ii) Preparation of Ethene from Ethanol. (iii) Preparation of Copper sulphate from Copper oxide.
• Why the level of concentrated sulphuric acid gets higher if it is left in an open vessel for a week ? 
• The impurity of arsenic oxide must be removed before passing the mixture of sulphur dioxide and air through the catalytic chamber in contact process. Why ?
•  What is the catalyst used in catalytic chamber and what is the temperature used ?
• State the property of sulphur dioxide which causes potassium permanganate to change its colour from purple to colourless.
•  Name the acid formed when sulphur dioxide dissolves in water.
• What are the two necessary conditions for the direct combination of sulphur dioxide and chlorine forming sulphuryl chloride?
•  Why brisk effervesence is seen when H2SO4 is added to sodium carbonate?
• (a) What is the property of concentrated sulphuric acid which allows it to be used in the preparation of hydrogen chloride and nitric acid?(b) What property of concentrated sulphuric acid is in action when sugar turns black in its presence?
•  Why the wooden shelves on which cone, sulphuric acid bottles are kept, stained black ?